Goodwill and Other Intangible Assets - Components of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 34,078	$ 34,767
Accumulated amortization	24,305	24,483
Net carrying amount	9,773	10,284
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	6,788	6,788
Accumulated amortization	4,229	4,026
Net carrying amount	2,559	2,762
Customer Related Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	7,604	8,819
Accumulated amortization	6,830	7,923
Net carrying amount	774	896
Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	19,686	19,160
Accumulated amortization	13,246	12,534
Net carrying amount	$ 6,440	$ 6,626